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I'm facing a classCastException issue while using grpc netty handlers along with OpenJSSE.

We are working on gRPC calls (which use Netty handlers for SSL communication). However, this is a Java agent and is supposed to be on a different runtime. The runtime that we are trying to intercept is running on OpenJSSE using -XX:+UseOpenJSSE.

Here is the issue—running the gRPC client and server throws:

java.lang.ClassCastException: io.netty.handler.ssl.OpenSslEngine cannot be cast to org.openjsse.javax.net.ssl.SSLEngine
Joseph
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Radianzz
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  • Which gRPC version are you using? – voidzcy Feb 18 '21 at 09:39
  • I have tried many combinations of grpc and netty along with tcnative to find out a solution. Last tried with below versions compile 'io.grpc:grpc-netty:1.35.0' compile 'io.grpc:grpc-protobuf:1.35.0' compile 'io.grpc:grpc-stub:1.35.0' runtime 'io.netty:netty-tcnative-boringssl-static:2.0.25.Final' compile 'io.netty:netty-handler:4.1.52.Final' compile 'io.netty:netty-handler-proxy:4.1.52.Final' – Radianzz Feb 19 '21 at 09:01
  • For people also being interested, the conversation continued on https://github.com/grpc/grpc-java/issues/7907. – voidzcy Feb 24 '21 at 21:05

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